This is the second set of these I have owned. The first ones were a couple generations old and at least 10x slower in the exact same installation but in an older arrangement they suited my purposes for 2/3 years. My experience has been nothing but great with the technology.
The ones I just bought add some nice encryption features (so some dude can't use an exterior plug and get on your network), light control (so you can turn off the indicator lights if they are bugging you), and diagnostic software that let you learn interesting things through trial and error like the fact that phone chargers mess with the signal. Luckily not enough to limit my bandwidth for internet (still get 85/75Mbps vs 100+ with the phone chargers unplugged). All in all I highly recommend them, far superior to my attempts to use wireless repeaters to cover the whole house.